Performance-adjustable full-cross-flow submersible electric pump
By using the fastener connection between the outer cylinder and the inner cylinder in a fully flow submersible electric pump and the inclined clearance sealing structure, the difficulty of flow and head adjustment and rotor deformation caused by the integrated design of the blade and the rotor are solved, and the problem of rotor deformation is achieved. The replaceability of impeller components and the guarantee of motor efficiency ensure the efficient operation and performance adaptability of the pump.
Patent Information
- Application Number
- CN202420653014.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-01
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-01
AI Technical Summary
The integrated design of the blade and rotor of the full flow pump leads to the inability to adjust the flow rate and head, and the welding of the outer circular end face of the blade can easily cause the rotor to deform and reduce the motor efficiency.
Design a fully-through submersible electric pump with adjustable performance. By setting the outer cylinder on the rotor and the inner cylinder on the blade, connecting it with fasteners to avoid disassembly and welding the rotor, and the replacement and adjustment of the blades are realized. Ensure that the rotor does not deform and reduce the motor temperature through the bevel gap sealing structure.
The replacement of impeller components is achieved, the rotor damage and deformation is avoided, the motor efficiency and the efficient operation of the pump are ensured, and the performance adaptability and stability under different working conditions are ensured.
Smart Images
Figure CN222162932U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of submersible pumps, in particular to a full-flow submersible electric pump with adjustable performance. Background Art
[0002] Full-throughflow pumps are mainly used for electromechanical irrigation and drainage, flood control and drainage, or low-lift and high-flow water intake projects combined with irrigation and drainage. The impeller is installed in the rotor cavity of the motor and forms a whole with the rotor. When working, the water flows through the rotor cavity. It has the characteristics of good hydraulic performance, smooth flow channel, and small axial size. However, the full-throughflow pump has the following disadvantages:
[0003] 1. The outer circular end surface of the blade is directly welded to the inner ring of the rotor core, which can easily cause the core to deform and reduce the efficiency of the motor.
[0004] 2. Since the blades and rotor are integrated, performance adjustment of flow rate and head cannot be performed. Summary of the invention
[0005] Technical problem: The technical problem to be solved by the utility model is: to provide a full-flow submersible electric pump with adjustable performance, in which the impeller components can be replaced as needed to meet different performance requirements, while avoiding secondary welding and deformation of the rotor, ensuring the efficiency of the motor, and making the full-flow submersible electric pump run efficiently.
[0006] Technical solution: To solve the above technical problems, the technical solution adopted by the embodiment of the utility model is:
[0007] A full-flow submersible electric pump with adjustable performance comprises a water inlet horn, a casing, a guide vane body, an impeller, a hydraulic chamber, a motor chamber, a transmission chamber and a motor assembly; one end of the casing is connected to the water inlet horn, and the other end is connected to the guide vane body; the motor chamber is located on the inner side of the casing; the hydraulic chamber is located on the inner side of the motor chamber; the transmission chamber is located on the inner side of the hydraulic chamber; the motor assembly is arranged inside the casing; one end of the impeller is connected to the motor assembly, and the other end is connected to the transmission shaft in the transmission chamber; the impeller comprises blades and a hub; the blades are arranged on the hub, the blades are connected to the motor assembly, and the hub is connected to the transmission shaft in the transmission chamber.
[0008] As a preferred example, the motor assembly includes a stator, a rotor, an inner cylinder and an outer cylinder; the stator is fixedly connected to the inner surface of the casing; the rotor is arranged on the inner side of the stator and has a clearance fit with the stator; the outer cylinder is fixedly connected to the rotor; the inner cylinder is fixedly connected to the blades; the inner cylinder and the outer cylinder are connected by fasteners.
[0009] As a preferred example, the inner cylinder and the outer cylinder are both hollow cylindrical structures; the inner cylinder is adapted to the outer cylinder; during operation, the rotor, the inner cylinder, the outer cylinder and the blades rotate synchronously.
[0010] As a preferred example, one end of the outer cylinder forms a first seal with the water inlet horn, and the other end of the outer cylinder forms a second seal with the guide vane body; the first seal is a labyrinth seal; and the second seal is a slope clearance fit structure.
[0011] As a preferred example, an inclined surface is provided at one end of the outer cylinder close to the guide vane body; the inclined surface forms an angle α with the horizontal line; 120°≤α≤150°.
[0012] As a preferred example, a first transmission body and a second transmission body are provided in the transmission cavity; the first transmission body and the guide vane body are fixedly connected, and the second transmission body and the water inlet horn are fixedly connected; the first transmission body cooperates with the wheel hub to form a first labyrinth seal; the second transmission body cooperates with the wheel hub to form a second labyrinth seal.
[0013] As a preferred example, the blades are arranged in a hydraulic chamber; the number of the blades is N, where N≥3.
[0014] Beneficial effects: Compared with the prior art, the technical solution of the utility model has the following beneficial effects: the technical solution of the utility model can replace the impeller components as needed to meet the different performance requirements under different working conditions. At the same time, since an outer cylinder is provided on the rotor and an inner cylinder is provided on the blades, the connection between the rotor and the blades is completed through the outer cylinder and the inner cylinder. When replacing the blades, there is no need to disassemble and weld the rotor, which avoids damage and deformation of the rotor, ensures the efficiency of the motor, and makes the full-flow submersible electric pump run efficiently. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a prior art structure diagram of an embodiment of the utility model;
[0016] Figure 2 It is a structural diagram of an embodiment of the utility model;
[0017] Figure 3 It is a schematic diagram of the cooperation between the impeller and the rotor of an embodiment of the utility model.
[0018] The figure includes: water inlet horn 1, casing 2, first seal 3, stator 4, rotor 5, second seal 6, guide vane body 7, impeller 8, blades 81, hub 82, first transmission body 9, hydraulic cavity 10, motor cavity 11, inner cylinder 12, outer cylinder 13, second transmission body 14, transmission cavity 15, and inclined surface 131. DETAILED DESCRIPTION
[0019] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings.
[0020] like Figure 1As shown, a performance-adjustable full-flow submersible electric pump according to an embodiment of the utility model comprises a water inlet horn 1, a casing 2, a guide vane body 7, an impeller 8, a hydraulic chamber 10, a motor chamber 11, a transmission chamber 15 and a motor assembly; one end of the casing 2 is connected to the water inlet horn 1, and the other end is connected to the guide vane body 7; the motor chamber 11 is located on the inner side of the casing 2; the hydraulic chamber 10 is located on the inner side of the motor chamber 11; the transmission chamber 15 is located on the inner side of the hydraulic chamber 10; the motor assembly is arranged inside the casing 2; one end of the impeller 8 is connected to the motor assembly, and the other end is connected to the transmission shaft in the transmission chamber 15; the impeller 8 comprises blades 81 and a hub 82; the blades 81 are arranged on the hub 82, the blades 81 are connected to the motor assembly, and the hub 82 is connected to the transmission shaft in the transmission chamber 15.
[0021] In a full-flow submersible electric pump with adjustable performance of the above structure, an outer cylinder 13 is arranged on the rotor 5, and an inner cylinder 12 is arranged on the outer ring of the blade 81, and the inner cylinder 12 and the outer cylinder 13 are detachably connected by fasteners. When the blade 81 needs to be replaced or the angle of the blade 81 needs to be adjusted according to the actual working conditions, it is only necessary to remove the fasteners between the inner cylinder 12 and the outer cylinder 13, and then remove the blade and the inner cylinder 12 together to readjust or replace them. In this process, the rotor 5 and the outer cylinder 13 do not need to be replaced or re-welded, avoiding multiple welding of the rotor 5 during the adjustment of the blade 81, so that the rotor 5 will not be damaged or deformed, thereby ensuring the working efficiency of the motor. At the same time, the second seal is set to a structure with an inclined clearance fit, so that the side of the outer cylinder 13 and the guide vane body 7 form an inclined angle, so that the water heated by the heat inside the motor cavity 11 can flow out from the second seal, thereby ensuring that the temperature inside the motor cavity 11 is not too high and will not cause damage to the motor, thereby maintaining the stable operation of the electric pump.
[0022] When the electric pump is operating normally, the submersible motor in the motor cavity 11 drives the impeller 8 to rotate at high speed, and the fluid flows from the water inlet horn 1 to the guide vane 7 and passes directly and quickly through the hydraulic cavity 10. When the high-speed fluid flows through the second seal 6, a local vacuum is generated at the inclined surface gap of the second seal, so that a small amount of water in the motor cavity 11 flows forward and inward through the inclined surface gap of the second seal, thereby taking away the heat generated by the motor in time and ensuring the reliable use of the motor.
[0023] When the hydraulic performance needs to be adjusted, the blades 81 need to be replaced or the angle of the blades 81 needs to be adjusted, after removing one end of the pump body, the fasteners connecting the inner cylinder 12 and the outer cylinder 13 are removed, so as to replace the impeller 8 and the inner cylinder 12 with different blade angles, or after cutting and grinding the blades 81, the inner and outer rings of the blades are re-welded and machined according to the new blade angle, and then the impeller 8 including the inner ring 12 is re-installed to achieve new hydraulic performance. In this process, the rotor 5 will not be welded for the second time, so as to ensure that the rotor 5 will not be damaged or deformed, and the reliable use of the water pump is guaranteed.
[0024] As a preferred example, the motor assembly includes a stator 4, a rotor 5, an inner cylinder 12 and an outer cylinder 13; the stator 4 is fixedly connected to the inner surface of the housing 2; the rotor 5 is arranged on the inner side of the stator 4 and has a clearance fit with the stator 4; the outer cylinder 13 is fixedly connected to the rotor 5; the inner cylinder 12 is fixedly connected to the blades 81; the inner cylinder 12 and the outer cylinder 13 are connected by fasteners. The outer cylinder 13 and the rotor 5 can be fixed by welding, the inner cylinder 12 and the blades 81 can be fixed by welding, and the inner cylinder 12 and the outer cylinder 13 can be connected by bolts. To ensure that the motor assembly is strong enough and has a solid structure when the electric pump is operating normally, when it is necessary to replace the blades 81 or adjust the angle of the blades 81 according to different working conditions, the fasteners between the inner cylinder 12 and the outer cylinder 13 are removed. At this time, the rotor 5 and the blades 81 are separated, and only the blades 81 and the inner cylinder 12 need to be removed for replacement. After replacement, the inner cylinder 12 and the outer cylinder 13 are connected with fasteners. During this process, the rotor will not be welded or dismantled for a second time, thereby avoiding damage or deformation of the rotor and allowing the overall pump station to operate stably.
[0025] As a preferred example, the inner cylinder 12 and the outer cylinder 13 are both hollow cylindrical structures; the inner cylinder 12 is adapted to the outer cylinder 13; when working, the rotor 5, the inner cylinder 12, the outer cylinder 13 and the blades 81 rotate synchronously. The inner cylinder 12 and the outer cylinder 13 are adapted to connect the rotor 5 and the blades 81 together, and the structure is stable. During normal operation, the rotor 5, the inner cylinder 12, the outer cylinder 13 and the blades 81 rotate synchronously to transport the fluid, and the operation is stable.
[0026] As a preferred example, one end of the outer cylinder 13 forms a first seal 3 with the water inlet horn 1, and the other end of the outer cylinder 13 forms a second seal 6 with the guide vane body 7; the first seal 3 is a labyrinth seal; the second seal 6 is a bevel gap matching structure. When the impeller 8 rotates at high speed to generate a fluid flowing in the direction of the guide vane body 7, a local vacuum is generated at the bevel gap of the second seal 6 formed by the guide vane body 7 and the outer cylinder 13. At this time, the water in the motor cavity 11 is heated by the heat generated by the motor. The heat generated by the motor can be taken away in time through the local vacuum, and the area near the motor is cooled to ensure the efficient operation of the motor.
[0027] As a preferred example, the outer cylinder 13 is provided with an inclined surface 131 at one end close to the guide vane body 7; the inclined surface 131 forms an angle α with the horizontal line; 120°≤α≤150°. The inclined surface gap formed between the inclined surface 131 and the guide vane body 7 is matched, and the angle α is set larger, so that the water with higher temperature in the motor cavity is easier to discharge, taking away more heat generated by the motor, and better cooling the motor, so that the motor will not fail and can run stably.
[0028] As a preferred example, the transmission cavity 15 is provided with a first transmission body 9 and a second transmission body 14; the first transmission body 9 is fixedly connected to the guide vane body 7, and the second transmission body 14 is fixedly connected to the water inlet horn 1; the first transmission body 9 cooperates with the wheel hub 82 to form a first labyrinth seal; the second transmission body 14 cooperates with the wheel hub 82 to form a second labyrinth seal. The first transmission body 9 and the second transmission body 14 are provided to prevent particles in the hydraulic cavity from entering the transmission cavity, so as to protect the reliable use of the mechanical seal in the transmission cavity.
[0029] As a preferred example, the blades 81 are arranged in the hydraulic chamber 10; the number of the blades 81 is N, N≥3. The hydraulic chamber 10 serves as a fluid channel, and the water flows directly out of the water inlet horn 1 through the channel through the blades 81. Arranging multiple blades 81 can make the flow guiding effect of the blades 81 better.
[0030] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above specific embodiments. The above specific embodiments and the description in the specification are only for further illustrating the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the claims and their equivalents.
Claims
1. A full-flow submersible electric pump with adjustable performance, characterized in that: The invention comprises a water inlet horn (1), a casing (2), a guide vane body (7), an impeller (8), a hydraulic chamber (10), a motor chamber (11), a transmission chamber (15) and a motor assembly; one end of the casing (2) is connected to the water inlet horn (1), and the other end is connected to the guide vane body (7); the motor chamber (11) is located on the inner side of the casing (2); the hydraulic chamber (10) is located on the inner side of the motor chamber (11); the transmission chamber (15) is located on the inner side of the hydraulic chamber (10); the motor assembly is arranged inside the casing (2); one end of the impeller (8) is connected to the motor assembly, and the other end is connected to the transmission shaft in the transmission chamber (15); the impeller (8) comprises blades (81) and a hub (82); the blades (81) are arranged on the hub (82), the blades (81) are connected to the motor assembly, and the hub (82) is connected to the transmission shaft in the transmission chamber (15).
2. The full-flow submersible electric pump according to claim 1, characterized in that: The motor assembly comprises a stator (4), a rotor (5), an inner cylinder (12) and an outer cylinder (13); the stator (4) is fixedly connected to the inner surface of the casing (2); the rotor (5) is arranged on the inner side of the stator (4) and is clearance-matched with the stator (4); the outer cylinder (13) is fixedly connected to the rotor (5); the inner cylinder (12) is fixedly connected to the blades (81); and the inner cylinder (12) and the outer cylinder (13) are connected by fasteners.
3. The full-flow submersible electric pump according to claim 2, characterized in that: The inner cylinder (12) and the outer cylinder (13) are both hollow cylindrical structures; the inner cylinder (12) is adapted to the outer cylinder (13); when working, the rotor (5), the inner cylinder (12), the outer cylinder (13) and the blades (81) rotate synchronously.
4. The full-flow submersible electric pump according to claim 2, characterized in that: One end of the outer cylinder (13) forms a first seal (3) with the water inlet horn (1), and the other end of the outer cylinder (13) forms a second seal (6) with the guide vane body (7); the first seal (3) is a labyrinth seal; and the second seal (6) is a slope clearance matching structure.
5. The full-throughflow submersible electric pump according to claim 4, characterized in that: An inclined surface (131) is provided at one end of the outer cylinder (13) close to the guide vane body (7); the inclined surface (131) forms an angle α with the horizontal line; 120°≤α≤150°.
6. The full-throughflow submersible electric pump according to claim 1, characterized in that: A first transmission body (9) and a second transmission body (14) are provided in the transmission cavity (15); the first transmission body (9) and the guide vane body (7) are fixedly connected, and the second transmission body (14) and the water inlet horn (1) are fixedly connected; the first transmission body (9) and the wheel hub (82) cooperate to form a first labyrinth seal; and the second transmission body (14) and the wheel hub (82) cooperate to form a second labyrinth seal.
7. The full-throughflow submersible electric pump according to claim 1, characterized in that: The blades (81) are arranged in the hydraulic chamber (10); the number of the blades (81) is N, where N≥3.